Pipe-molding machine.



J. B. DAVIE.

PIPE MOLDING MACHINE.

APPLICATION HLED FEB. 24. 1915.

Patented Dec. 12, 1916.

2 SHEETSSHEET I.

w I a i. B. WWflIEn PiPE MOLDING MACHINE.

APPLICATION FILED FEB. 24, me.

Patented Dec. 12, 1916..

2 SHEETS-SHEET 2.

' Pipe-Mel Maees, of whichthe fol-' w is a ecification.=-="

i form and p ct-a sandmol y-.1

Y rn-rro narra or.

.l lic tion Febm r3 Be it knownthatll, deems Dsvrnfia citizen of the United dtate's, and a resident of Fig;- I. Fig. 3 is an enlarged cross-section the boron h oflBrooklyn, county of ft or y city and tate of New York, have invented certain new and useful Improvements in be formed, packed, smoothed a aemiwashed .mechanicall g I Another object of my invention is a device whereby the sand may be packed unifoy and evenly.

Another object of my invention isa .de-

wvice whereby the rapidity of the production of a pipe mold may be greatly increased overlthe present own. methods.v

Another object of my illVtBllllJlOlll'dlSif a 'device whereby the rotary and longitual movement of a pattern through the desk Another object of my invention "is a device I in which the passage .ofa plug throuh the evident upon a consideration ofnay-specifithe many objections to the present'employed I formed sand mold will thoroughly lackwash the mold. 4 v

Uther objects of my invention willbecome cation and claims.

in the device of my invention, l[ overeome methods of making sand pipe molds with their incident slowness of production, high cost of labor employed and uncertainty of results due. to hand labor, by employing'a attern which'is caused to pass through the t1 ask with a revolving "motion, that will I pack the sand. evenly and thoroughly to any desired thicmess, with-a .maum of pro d5 washing of themold, I device, which will indi- I duction and a'um' of labor the same device being suitable for the forth 'Une form of;

cate the see e a idea of my invention,

shown in t e accompanying drawings, in" which like parts are indicated by slmila numerals.

' ,i'nrrns nnvrn, on pace hlly invention relates to the foation of pipe molds and refers particularly to a deor black nr a Fire 1 is an elevation, partly in section,

vshowing a battery of two devic Fig. 2 18 across section throh the m1 2-2 of of the pattern and its moving parts. Fig. A

is an enlarged view of the distributing blades of the pattern. Fig. 5 is a crosssection'through the line 5--5 of lFi A.

' An ordinary flanged-pipe mold ask '6' is 'removably attached to'the tubular pattern container .7 by means of the clamps 8, sit. uated at convenient places. The container 7 is removably attached to the gear containing chamber 9, by means of the bolts 10, 10. The gear contag chamber 9 is attached bolts 12, 12, in alinement with the piston containing chamber or'pit 13. 1

Within the pattern containing chamber eter of the flask 7 is greater than the a" eter of the pattern 14. The upper portion of the'pattern 1d. formed into' the' shape wardly projecting distributing blades or guides 16, 16 having parallel curved outer edges. These blades 16, 16 extend upwardly from the-recess 54L withinthe upper portion of the pattern 14, the outer edges thereof being in a plane parallel to the surfaceof the truncated cone 159, and being in ralor attached to-the angular ring 55 attac ed to "to the door or support 11, by means of the Q offatrunca ted cone 15, adjacent to" which and attached thereto are a number of outthetop of, the truncated cone 15; the outer edge of the bladesv l6, 16 being flush with the outer edge of the ring 55, the diameter of the ring 55 being'less than the diameter of the pattern 1A. This formation of the pattern and the bladesallowsthe sand to pass downwardly, between the surface of the truncated cone to .and the inner surface of the flask 7, the shape of the blades being as I such that the revolution and upward motion with regularity and uniform density into .t e ,ace betweenthezflask t and the pattern ithin a recess 17 within the upper coned topof the'pattern .14, is the end of a rod 18 extending upwardly, the

of the pattern, as describedlater, will cause the sand tow-be conveyed and compressed lower end of the rod'1'8' being supported by the sand from finding its way into the'bear- -32 working within mgs and supporting members at the top of the pattern. 7 The upper end of the rod 18.

is connected with a flexible rope or chain 22, for purposes to be described later. The cone 21 is attached to the pattern 14 by means of the set bolts 62.

A square shaft 23 is attached at its upper end to the support 24, which in turn is attached to the pattern 14 at the top of the recess 25 in the lower end of the pattern '14. The shaft 23- is attached to the support 24 by means of a bayonet joint 26, so that a half turn ,of the pattern 14 will release it from the shaft 23. The shaft 23 passes downwardly through the revoluble sleeve 27, havin a square bore to fit the square shaft, the s eeve 27 being revoluble within the bearing 28,. The square shaft 23 then passes downwardly through the square cored gear wheel 29, which meshes with the gear wheel 30, the gear wheel 29 being revoluble upon the bearing 31. The end of the shaft 23 is revolubly attached to the piston 32, by means of the ball bearings 33, the piston the piston chamber 13. A support 35 prevents the piston from reaching the bottom of the piston chamber, and ball bearings 36 allow the revolution of the piston 32 when it rests upon the sup-. port 35; A pipe 37, situated below the top of the support 35, connects the piston chamber 13 with the air, the pipe terminating in a valve 38. I

The gear wheel 30 is fixedly attached to the shaft 39, which in turn is connected to a source of revolution, as the motor 40.

The rope 22 is capable of bein passed over the sheave 41 and around t e drum 42, by means of the motor 43, these elements being supported upon the revoluble support 44.

A sand chute 45, allows the introduction of sand into the flask 6 from thesand hopper 46, into which sand is supplied by any convenient means. 7

The black-wash plug 47 is cylindrical in form, of slightly less diameter than the pattern 14, and has afiixed to its upper end, a flexible washer 48, as'of rubber, the diameter of which is equal to, or slightly greater than, the diameter of the pattern 14. Within a recess within the lower side of the plug 47, is a bayonet'joint 49, whereby the rod 18 may be quickly and effectively attached-or detached.

A black-wash outlet pipe 50 is so situated that it is below the top of the pattern 14, when the pattern is at its lowest possible continued. both an ascending and rotating movement,

position and flush with thetop of the blackwash plug; when it is at-its lowest position. This pipe 50 connects with the reservoir 51.

It is preferable to arrange the flasks and mechanism in pairs, around the support 44, as shown in Fig. 1, so that the operation may be practically continuous.

The operation of the device is as follows: The pattern 14 affixed to the square shaft 23 by means of the bayonet joint 26 is at its lowest position, that is until it rests upon the floor 61 of the chamber 7. The

cock 38' is opened to allow access of air through the pipe 37 below the. piston 32. The gear wheel 29, is revolved by means of the gear wheel 30, the shaft 39 and the motor 40. The revolution of the gear wheel 43 and the "rope 22, the flow of sand being The pattern 14 is thus given during which the sand is packed and distributed evenly andthoroughly between the outer surface of the pattern 14 and the inner surface of the flask 6, the former having a tendency to pack the sand and smooth the inner surface thereof. When the pattern 14 has reached the top of the flask 6, the socket mold may be formed in the usual manner and then the attern 14 is removed from'the flask'6 by a urther'upward movement of the rope 22 and the motor 40 stopped. The upward movement of the pattern 14 and the piston '32 draws air into the piston chamber 13 below the piston 32 through the pipe 37, the valve 38 being open. The air valve 38 is thenclosed, and the pattern 14 removed from the square rod 23 by means of the bayonet joint 26, and while suspended is revolved over and lowered into a second flask, which has been placed in position, thus allowing of continued action. The air beneath the piston 32 retains the latter in its raised position and also the square rod 23 attached thereto. A black-wash plug 47 Y is then attached to thetop of the square'rod 23 by means of the bayonet joint 49, and a sufiicient quantity of blac -wash liquor poured thereon. The air cook 38 is then 0 ened sufficiently to allow the proper lowering of the piston 32 and the black-wash plug, the black-wash being thus thoroughly and evenly applied to al parts of the sand mold 52. When the plug 47 has reached its lowest position, the

naoenov excess of black-wash liquor remaining thereon escapes through the pipe 50 into the reservoir 51. The flask 6 and the inclosed pipe mold 52 are then removed and baked inthe'usual manner, the black-wash plug removed, and a new flask introduced for the next mold.

llt is thus seen that the formation and preparation of the sand mold are accomplished by the upward revolving motion of the pattern and the downward motion of the black-wash lug. lit is to be further noted that the black-washing operation requires no power, as the plug descends by gravity controlled by the air cushion beneath the piston to which the plug is at tached. lt is evident that these operations can be accomplished with great regularity and rapidity and at a mum of labor cost.

it is evident that all of the parts described in detail in the description of the drawings may be varied, without interfering with the practical operation or construction of the device of my invention, and therefore ll do not limit myself to the particular size, shape, number or arrangement of parts as described, all of which may be varied without going beyond the scope of my invention as described and claimed.

What is claimed, is: 1., ln. a device of the character described,

in combination, a cylindrical flask, a piston,

a piston box, a piston rod, a cylindrical pattern of less diameter than the flask removably attached to the downwardly extending piston rod attached to the piston, said piston being movably incased within the. piston box, sand distributing blades upon the pattern, and means for moving the pattern through the flask with a revolving motion.

2. In a device of the character described, in combination, a cylindrical flask, a piston,

' a piston box, a piston rod, a cylindrical pattern of less diameter than the flask removably attached to the downwardly extending piston rod attached to the piston, said piston being movably-incased within thepiston box, means for'moving the pattern through the flask with a revolving motion, a black-wash plug, means for removably attaching the black-wash plug to the piston rod, means for passing the black-wash plug through the flask, and means for depositing sand between the flask and the pattern.

3. In a device of the character described, in combination, a cylindrical flask, a piston, a piston rod, a piston box, a cylindrical pattern of less diameter than the flask removably attached to the downwardly extending piston rod attached to the piston, said piston being movably incased within the piston box, means for movi the pattern through the flask with a revolving motion, means for admittin air beneath the piston dg its ting and retainin upward stroke, means for allog and preventing the escape of said air from beneath the piston, and means for depositing sand between the flask and the pattern during the movement of the latter.

4. lln a device of the character described,

in combination,- a cylindrical flask, a cylindrical attern of less diameter than the flask and wlthin the flask, a piston, a piston box, a piston rod connecting the pattern with the piston, the piston being movable thin the piston-box, means for raising and lowering the piston rod and pattern, means for rotating the piston rod and pattern during their passage through the flask, means for a 1m air beneath the piston, means for removing the pattern from the rod, and means carried by the pattern for uniformly distribut sand between the ;;n atem and the flask during the movement the former.

6. lln a device of the character described, in combination, a cylindrical flask, a cylindrical pattern within the flask, saidpattern being of less diameter than the flask, having an upper portion in theform of a truncated cylindrical cone and drical cone, sand distributing lades upon the pattern, a piston, a rod removably connecting the lower portion of the attern with the piston, a plston-box contaimn the piston, gear wheels for revolving the re and pattern, means for revolving the gear wheels, means for hoisting the pattern and rod through the flask, means for allowing the revolution of the piston du its passage through the flask, means for admitting, retainin and allowing of the escape of air. within t e piston-box 'below'the piston, and means carried by the pattern above the cylindrical portion thereof to distribute sand between the pattern and flask during the movement of the former.

7. In a device of the character described, in combination, a cylindrical flask, a cylindrical pattern of less diameter than the flask within the flask, sand distributing blades upon the attern, a ring surroundin the blades and ash with the true edge of said blades, a piston, a piston rod connecting the pattern with the piston, a piston-box containing the w means for mo my the in a cylin-' allowing the piston rod to revolve without the revolution of the piston, a black-wash plug, means for attaching and detaching the black-wash plug to the piston rod, means for admitting air to the piston-box beneath the piston during the upward movement of the piston, means for retaining the 'air beneath the iston, and means for allowing the exhaustion of the air from beneath 15 the piston allowing the piston to descend.

S1gned at New York city, in the county of New York and State of New York, this 17th day of February, 1916.

v I JAMES B. DAVIE.

Witnesses:

G. H. RAYMOND, ABEL L. Bnownmee. 

